Immediately before I downloaded and updated to iOS 6, my phone charged in my computer's tower front USB port. Immediately following, it will not. I plugged it into my wall charger at home and it charges fine. Has anyone run into this and/or solved it yet?
As noted in the comments, the asker hadn't restarted her Mac, and the problem was not something that lasted after the reboot so the charging either fixed itself and the reboot was as good as her going to make some tea to drink (let time pass) or the reboot was needed fix the issue.
So, if this happens to you, reboot and make a pot of tea. If that doesn't fix it, you can always ask another question here with your details and we'll see what we can do to help.